package com.iflytek.uoamp.notify.wechat.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.log4j.Logger;

import com.alibaba.fastjson.JSONObject;
import com.iflytek.uoamp.common.notify.util.Configurator;

public class WeixinUtil {

	private static Logger log = Logger.getLogger(WeixinUtil.class);
	
	// 获取access_token的接口地址（GET） 限200（次/天）
	private final static String ACCESS_TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";

	private final static String GET_OPENID = "https://api.weixin.qq.com/cgi-bin/user/get?access_token=ACCESS_TOKEN";
	// 获取用户基本信息接口地址
	private final static String USERINFO_URL = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=ACCESS_TOKEN&openid=OPENID";

	/**
	 * 发起https请求并获取结果
	 * 
	 * @param requestUrl
	 *            请求地址
	 * @param requestMethod
	 *            请求方式（GET、POST）
	 * @param outputStr
	 *            提交的数据
	 * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
	 */
	public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {
		JSONObject jsonObject = null;
		StringBuffer buffer = new StringBuffer();
		
		HttpsURLConnection httpUrlConn = null;
		OutputStream outputStream = null;
		InputStream inputStream = null;
		InputStreamReader inputStreamReader = null;
		BufferedReader bufferedReader = null;
		try {
			// 创建SSLContext对象，并使用我们指定的信任管理器初始化
			TrustManager[] tm = { new MyX509TrustManager() };
			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			// 从上述SSLContext对象中得到SSLSocketFactory对象
			SSLSocketFactory ssf = sslContext.getSocketFactory();

			URL url = new URL(requestUrl);
			httpUrlConn = (HttpsURLConnection) url.openConnection();
			httpUrlConn.setSSLSocketFactory(ssf);

			httpUrlConn.setDoOutput(true);
			httpUrlConn.setDoInput(true);
			httpUrlConn.setUseCaches(false);
			//设置http连接超时时间
			httpUrlConn.setConnectTimeout(Integer.valueOf(Configurator.getInstance().getPropertyByKey("http_connect_timeout", "5000")));
			//设置读写请求
			httpUrlConn.setReadTimeout(Integer.valueOf(Configurator.getInstance().getPropertyByKey("http_read_timeout", "5000")));
			
			// 设置请求方式（GET/POST）
			httpUrlConn.setRequestMethod(requestMethod);

			if ("GET".equalsIgnoreCase(requestMethod))
				httpUrlConn.connect();

			// 当有数据需要提交时
			if (null != outputStr) {
				outputStream = httpUrlConn.getOutputStream();
				// 注意编码格式，防止中文乱码
				outputStream.write(outputStr.getBytes("UTF-8"));
				outputStream.close();
			}

			// 将返回的输入流转换成字符串
			inputStream = httpUrlConn.getInputStream();
			inputStreamReader = new InputStreamReader(inputStream, "utf-8");
			bufferedReader = new BufferedReader(inputStreamReader);

			String str = null;
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			bufferedReader.close();
			inputStreamReader.close();
			// 释放资源
			inputStream.close();
			
			jsonObject = JSONObject.parseObject(buffer.toString());
		} catch (ConnectException ce) {
			log.error("Weixin server connection timed out.");
		} catch (Exception e) {
			log.error("https request error:{}", e);
		} finally {
			if(outputStream != null) {
				try {
					outputStream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			
			if(bufferedReader != null) {
				try {
					bufferedReader.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			
			if(inputStreamReader != null) {
				try {
					inputStreamReader.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			
			if(inputStream != null) {
				try {
					inputStream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			
			if(httpUrlConn != null)	httpUrlConn.disconnect();
		}
		return jsonObject;
	}

	/**
	 * 获取access_token
	 * 
	 * @param appid
	 *            凭证
	 * @param appsecret
	 *            密钥
	 * @return
	 */
	public static AccessToken getAccessToken(String appid, String appsecret) {
		AccessToken accessToken = null;
		String requestUrl = ACCESS_TOKEN_URL.replace("APPID", appid).replace("APPSECRET", appsecret);
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		if (null != jsonObject) {
			try {
				accessToken = new AccessToken();
				accessToken.setToken(jsonObject.getString("access_token"));
				accessToken.setExpiresIn(jsonObject.getIntValue("expires_in"));
			} catch (Exception e) {
				accessToken = null;
				// 获取token失败
				log.error("获取token失败 errcode:{" + jsonObject.getIntValue("errcode")
						+ "} errmsg:{" + jsonObject.getString("errmsg") + "}");
			}
		}
		return accessToken;
	}

	/**
	 * 拉取用户openId
	 * @param accessToken
	 * @return
	 */
	public static JSONObject getUserOpenId(String accessToken) {
		String requestUrl = GET_OPENID.replace("ACCESS_TOKEN", accessToken);
		JSONObject obj = httpRequest(requestUrl, "GET", null);
		if (null != obj) {
			try {
				log.info(obj.getIntValue("total"));
			} catch (Exception e) {
				log.error(e.getMessage());
			}
		}
		return obj;
	}

	/**
	 * 通过openId获取
	 * 
	 * @param openId
	 * @return
	 */
	public static JSONObject getWechatUserInfo(String openId, String accessToken) {
		String requestUrl = USERINFO_URL.replace("ACCESS_TOKEN", accessToken).replace("OPENID", openId);
		JSONObject result = null;
		HttpClient client = new HttpClient();
		GetMethod get = new GetMethod(requestUrl);
		try {
			client.executeMethod(get);
			String returnJson = get.getResponseBodyAsString();
			returnJson = new String(returnJson.getBytes("ISO8859_1"), "UTF-8");
			result = JSONObject.parseObject(returnJson);
			return result;
		} catch (Exception e) {
			log.error(e.getMessage());
		}
		return result;
	}
}
